+ c = registry_findclass(state->package, name);
+ if(c) return c;
+
+ /* try explicit imports */
+ dictentry_t* e = dict_get_slot(state->imports, name);
+ if(c) return c;
+ while(e) {
+ if(!strcmp(e->key, name)) {
+ c = (classinfo_t*)e->data;
+ if(c) return c;
+ }
+ e = e->next;
+ }
+
+ /* try package.* imports */
+ import_list_t*l = state->wildcard_imports;
+ while(l) {
+ //printf("does package %s contain a class %s?\n", l->import->package, name);
+ c = registry_findclass(l->import->package, name);
+ if(c) return c;
+ l = l->next;
+ }
+
+ /* try global package */
+ c = registry_findclass("", name);
+ if(c) return c;
+
+ /* try local "filename" package */
+ c = registry_findclass(current_filename_short, name);
+ if(c) return c;
+
+ return 0;
+}
+
+static char is_getlocal(code_t*c)
+{
+ if(!c || c->prev || c->next)
+ return 0;
+ return(c->opcode == OPCODE_GETLOCAL
+ || c->opcode == OPCODE_GETLOCAL_0
+ || c->opcode == OPCODE_GETLOCAL_1
+ || c->opcode == OPCODE_GETLOCAL_2
+ || c->opcode == OPCODE_GETLOCAL_3);
+}
+static int getlocalnr(code_t*c)
+{
+ if(c->opcode == OPCODE_GETLOCAL) {return (ptroff_t)c->data[0];}
+ else if(c->opcode == OPCODE_GETLOCAL_0) {return 0;}
+ else if(c->opcode == OPCODE_GETLOCAL_1) {return 1;}
+ else if(c->opcode == OPCODE_GETLOCAL_2) {return 2;}
+ else if(c->opcode == OPCODE_GETLOCAL_3) {return 3;}
+ else syntaxerror("Internal error: opcode %02x is not a getlocal call", c->opcode);
+ return 0;
+}
+
+static code_t* toreadwrite(code_t*in, code_t*middlepart, char justassign, char readbefore)
+{
+ /* converts this:
+
+ [prefix code] [read instruction]
+
+ to this:
+
+ [prefix code] ([dup]) [read instruction] [middlepart] [setvar] [write instruction] [getvar]
+ */
+
+ if(in && in->opcode == OPCODE_COERCE_A) {
+ in = code_cutlast(in);
+ }
+ if(in->next)
+ syntaxerror("internal error");
+
+ /* chop off read instruction */
+ code_t*prefix = in;
+ code_t*r = in;
+ if(r->prev) {
+ prefix = r->prev;r->prev = 0;
+ prefix->next=0;
+ } else {
+ prefix = 0;
+ }
+
+ char use_temp_var = readbefore;
+
+ /* generate the write instruction, and maybe append a dup to the prefix code */
+ code_t* write = abc_nop(0);
+ if(r->opcode == OPCODE_GETPROPERTY) {
+ write->opcode = OPCODE_SETPROPERTY;
+ multiname_t*m = (multiname_t*)r->data[0];
+ write->data[0] = multiname_clone(m);
+ if(m->type == QNAME || m->type == MULTINAME) {
+ if(!justassign) {
+ prefix = abc_dup(prefix); // we need the object, too
+ }
+ use_temp_var = 1;
+ } else if(m->type == MULTINAMEL) {
+ if(!justassign) {
+ /* dupping two values on the stack requires 5 operations and one register-
+ couldn't adobe just have given us a dup2? */
+ int temp = gettempvar();
+ prefix = abc_setlocal(prefix, temp);
+ prefix = abc_dup(prefix);
+ prefix = abc_getlocal(prefix, temp);
+ prefix = abc_swap(prefix);
+ prefix = abc_getlocal(prefix, temp);
+ if(!use_temp_var);
+ prefix = abc_kill(prefix, temp);
+ }
+ use_temp_var = 1;
+ } else {
+ syntaxerror("illegal lvalue: can't assign a value to this expression (not a qname/multiname)");
+ }
+ } else if(r->opcode == OPCODE_GETSLOT) {
+ write->opcode = OPCODE_SETSLOT;
+ write->data[0] = r->data[0];
+ if(!justassign) {
+ prefix = abc_dup(prefix); // we need the object, too
+ }
+ use_temp_var = 1;
+ } else if(r->opcode == OPCODE_GETLOCAL) {
+ write->opcode = OPCODE_SETLOCAL;
+ write->data[0] = r->data[0];
+ } else if(r->opcode == OPCODE_GETLOCAL_0) {
+ write->opcode = OPCODE_SETLOCAL_0;
+ } else if(r->opcode == OPCODE_GETLOCAL_1) {
+ write->opcode = OPCODE_SETLOCAL_1;
+ } else if(r->opcode == OPCODE_GETLOCAL_2) {
+ write->opcode = OPCODE_SETLOCAL_2;
+ } else if(r->opcode == OPCODE_GETLOCAL_3) {
+ write->opcode = OPCODE_SETLOCAL_3;
+ } else {
+ code_dump(r);
+ syntaxerror("illegal lvalue: can't assign a value to this expression");
+ }
+ code_t* c = 0;
+
+ int temp = -1;
+ if(!justassign) {
+ if(use_temp_var) {
+ /* with getproperty/getslot, we have to be extra careful not
+ to execute the read code twice, as it might have side-effects
+ (e.g. if the property is in fact a setter/getter combination)
+
+ So read the value, modify it, and write it again,
+ using prefix only once and making sure (by using a temporary
+ register) that the return value is what we just wrote */
+ temp = gettempvar();
+ c = code_append(c, prefix);
+ c = code_append(c, r);
+ if(readbefore) {
+ c = abc_dup(c);
+ c = abc_setlocal(c, temp);
+ }
+ c = code_append(c, middlepart);
+ if(!readbefore) {
+ c = abc_dup(c);
+ c = abc_setlocal(c, temp);
+ }
+ c = code_append(c, write);
+ c = abc_getlocal(c, temp);
+ c = abc_kill(c, temp);
+ } else {
+ /* if we're allowed to execute the read code twice *and*
+ the middlepart doesn't modify the code, things are easier.
+ */
+ code_t* r2 = code_dup(r);
+ //c = code_append(c, prefix);
+ parserassert(!prefix);
+ c = code_append(c, r);
+ c = code_append(c, middlepart);
+ c = code_append(c, write);
+ c = code_append(c, r2);
+ }
+ } else {
+ /* even smaller version: overwrite the value without reading
+ it out first */
+ if(!use_temp_var) {
+ if(prefix) {
+ c = code_append(c, prefix);
+ c = abc_dup(c);
+ }
+ c = code_append(c, middlepart);
+ c = code_append(c, write);
+ c = code_append(c, r);
+ } else {
+ temp = gettempvar();
+ if(prefix) {
+ c = code_append(c, prefix);
+ }
+ c = code_append(c, middlepart);
+ c = abc_dup(c);
+ c = abc_setlocal(c, temp);
+ c = code_append(c, write);
+ c = abc_getlocal(c, temp);
+ c = abc_kill(c, temp);
+ }
+ }
+ return c;
+}
+
+char is_break_or_jump(code_t*c)
+{
+ if(!c)
+ return 0;
+ if(c->opcode == OPCODE_JUMP ||
+ c->opcode == OPCODE___BREAK__ ||
+ c->opcode == OPCODE___CONTINUE__ ||
+ c->opcode == OPCODE_THROW ||
+ c->opcode == OPCODE_RETURNVOID ||
+ c->opcode == OPCODE_RETURNVALUE) {
+ return 1;
+ }
+ return 0;
+}
+
+
+#define IS_FINALLY_TARGET(op) \
+ ((op) == OPCODE___CONTINUE__ || \
+ (op) == OPCODE___BREAK__ || \
+ (op) == OPCODE_RETURNVOID || \
+ (op) == OPCODE_RETURNVALUE || \
+ (op) == OPCODE___RETHROW__)
+
+static code_t* insert_finally_lookup(code_t*c, code_t*finally, int tempvar)
+{
+#define NEED_EXTRA_STACK_ARG
+ code_t*finally_label = abc_nop(0);
+ NEW(lookupswitch_t, l);
+ //_lookupswitch
+
+ code_t*i = c;
+ int count=0;
+ while(i) {
+ code_t*prev = i->prev;
+ if(IS_FINALLY_TARGET(i->opcode)) {
+ code_t*p = prev;
+ char needvalue=0;
+ if(i->opcode == OPCODE___RETHROW__ ||
+ i->opcode == OPCODE_RETURNVALUE) {
+ if(i->opcode == OPCODE___RETHROW__)
+ i->opcode = OPCODE_THROW;
+ needvalue=1;
+ p = abc_coerce_a(p);
+ p = abc_setlocal(p, tempvar);
+ }
+ p = abc_pushbyte(p, count++);
+ p = abc_jump(p, finally_label);
+ code_t*target = p = abc_label(p);
+#ifdef NEED_EXTRA_STACK_ARG
+ p = abc_pop(p);
+#endif
+ if(needvalue) {
+ p = abc_getlocal(p, tempvar);
+ }
+
+ p->next = i;i->prev = p;
+ list_append(l->targets, target);
+ }
+ i = prev;
+ }
+
+ code_t*j,*f;
+ c = abc_pushbyte(c, -1);
+ c = code_append(c, finally_label);
+ c = code_append(c, finally);
+
+#ifdef NEED_EXTRA_STACK_ARG
+ c = abc_dup(c);
+#endif
+ c = abc_lookupswitch(c, l);
+ c = l->def = abc_label(c);
+#ifdef NEED_EXTRA_STACK_ARG
+ c = abc_pop(c);
+#endif
+
+ return c;
+}
+
+static code_t* insert_finally_simple(code_t*c, code_t*finally, int tempvar)
+{
+ code_t*i = c;
+ while(i) {
+ code_t*prev = i->prev;
+ if(IS_FINALLY_TARGET(i->opcode)) {
+ if(i->opcode == OPCODE___RETHROW__)
+ i->opcode = OPCODE_THROW;
+ code_t*end = code_dup(finally);
+ code_t*start = code_start(end);
+ if(prev) prev->next = start;
+ start->prev = prev;
+ i->prev = end;
+ end->next = i;
+ }
+ i = prev;
+ }
+ return code_append(c, finally);
+}
+
+code_t* insert_finally(code_t*c, code_t*finally, int tempvar)
+{
+ if(!finally)
+ return c;
+ code_t*i = c;
+ char cantdup=0;
+ int num_insertion_points=0;
+ while(i) {
+ if(IS_FINALLY_TARGET(i->opcode))
+ num_insertion_points++;
+ i = i->prev;
+ }
+ i = finally;
+ int code_size=0;
+ while(i) {
+ code_size++;
+ if(i->branch || i->opcode == OPCODE_LOOKUPSWITCH) {
+ cantdup=1;
+ }
+ i = i->prev;
+ }
+ int simple_version_cost = (1+num_insertion_points)*code_size;
+ int lookup_version_cost = 4*num_insertion_points + 5;
+
+ if(cantdup || simple_version_cost > lookup_version_cost) {
+ printf("lookup %d > *%d*\n", simple_version_cost, lookup_version_cost);
+ return insert_finally_lookup(c, finally, tempvar);
+ } else {
+ printf("simple *%d* < %d\n", simple_version_cost, lookup_version_cost);
+ return insert_finally_simple(c, finally, tempvar);
+ }
+}
+
+#define PASS1 }} if(as3_pass == 1) {{
+#define PASS1END }} if(as3_pass == 2) {{
+#define PASS2 }} if(as3_pass == 2) {{
+#define PASS12 }} {{
+#define PASS12END }} if(as3_pass == 2) {{
+
+%}
+
+%%
+
+/* ------------ code blocks / statements ---------------- */
+
+PROGRAM: MAYBE_PROGRAM_CODE_LIST
+
+MAYBE_PROGRAM_CODE_LIST: | PROGRAM_CODE_LIST
+PROGRAM_CODE_LIST: PROGRAM_CODE
+ | PROGRAM_CODE_LIST PROGRAM_CODE
+
+PROGRAM_CODE: PACKAGE_DECLARATION
+ | INTERFACE_DECLARATION
+ | CLASS_DECLARATION
+ | FUNCTION_DECLARATION
+ | SLOT_DECLARATION
+ | PACKAGE_INITCODE
+ | ';'
+
+MAYBE_INPACKAGE_CODE_LIST: | INPACKAGE_CODE_LIST
+INPACKAGE_CODE_LIST: INPACKAGE_CODE
+ | INPACKAGE_CODE_LIST INPACKAGE_CODE
+
+INPACKAGE_CODE: INTERFACE_DECLARATION
+ | CLASS_DECLARATION
+ | FUNCTION_DECLARATION
+ | SLOT_DECLARATION
+ | PACKAGE_INITCODE
+ | ';'
+
+MAYBECODE: CODE {$$=$1;}
+MAYBECODE: {$$=code_new();}